The vasovagal response during confrontation with blood-injury-injection stimuli: the role of perceived control

Journal of Anxiety Disorders
Philippe T GilchristBlaine Ditto

Abstract

The vasovagal response (VVR) is a common medical problem, complicating and deterring people from various procedures. It is an unusual stress response given the widespread decreases in physiological activity. Nevertheless, VVR involves processes similar to those observed during episodes of strong emotions and pain. We hypothesized that heightened perceived control would reduce symptoms of VVR. Eighty-two young adults were randomly assigned to perceived control or no perceived control conditions during exposure to a stimulus video of a mitral valve surgery, known to trigger VVR in non-medical personnel. Perceived control was manipulated by allowing some participants to specify a break time, though all received equivalent breaks. Outcomes included subjective symptoms of VVR, anxiety, blood pressure, heart rate, and other measures derived from impedance cardiography. Compared to participants with perceived control, participants with no perceived control reported significantly more vasovagal symptoms and anxiety, and experienced lower stroke volume, cardiac output, and diastolic blood pressure. Participants who were more fearful of blood were more likely to benefit from perceived control in several measures. Perceived control appear...Continue Reading

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Citations

Sep 10, 2015·Pain Medicine : the Official Journal of the American Academy of Pain Medicine·April Hazard VallerandThomas N Templin
Sep 17, 2015·Clinical Child and Family Psychology Review·Ella L OarThomas H Ollendick
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Oct 31, 2019·Transfusion·Philippe T GilchristBlaine Ditto
Feb 16, 2021·Journal of Clinical Apheresis·Rui HeZhong Liu

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